\usetypescript[modern-base][t2a]
\setupbodyfont[modern]

Should work in MkII if you have cm-super font package installed, but doesn't work for me, so I personally use my own typescript with custom fonts. Maybe someone can help me figure out why ConTeXt doesn't try to generate .tfm's for cm-super? Is there some command to increase verbosity?

Gour wrote: 
Hello!

I was able to persuade one user to prepare ConTeXt package for NixOS
distro, but, unfortunately, being from Russia he quickly discovered that
he minimal example from wiki (http://wiki.contextgarden.net/Russian)
does not work, i.e.

\enableregime[utf]
\useencoding[cyr]

\definetypeface [russian]
  [rm] [serif] [computer-modern] [default] [encoding=t2a]

\setupbodyfont[russian]
\starttext
Мама и Папа % Some Russian characters
\stoptext


does transliterate Russian characters.

I do not have any experience working with Cyrillic, so if anyone can
provide minimal working example it would be very nice?

I persistently claimed that "it must work!" :-)


Sincerely,
Gour

  

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-- 
Best Regards,
Oleg Kolosov